Real-World Body Composition and Blood Pressure Changes Following Glucagon-Like Peptide 1 Receptor Agonist Initiation: A Causal Inference Study of Connected Device Data
- Design
- Retrospective cohort · Intermediate outcome
- Match to healthy normal-weight adults aged 55–75
- Population unclear[Auto] Population characteristics not extractable from abstract (age/BMI not reported in abstract). Needs manual review.
- Could weight loss explain it?
- Unknown[Auto] Not addressed in abstract.
- Study tier
- Study tier 3[Auto] Observational design; confounding by indication and healthy-user effects cannot be excluded (auto-provisional).
- Assessment
- Version 1 · automatic, not yet reviewed by a person · Sep 20, 2026
Study facts come from the paper. Population match, weight-loss explanation and study tier are our judgments, made against the reference group of healthy normal-weight adults aged 55–75.
[Auto, unreviewed; quoted from abstract conclusions] In a real-world setting, GLP-1 RA initiation was associated with clinically significant fat-predominant weight loss and sustained BP improvements. Baseline MFR predicted weight loss quality, suggesting that pretreatment body composition may help clinicians anticipate individual responses-a step toward precision medicine in GLP-1 RA therapy.
01Findings
What the study reported
- Drugs
- Class unspecified
- Primary outcome
- Not extracted
- Effect
- Not extracted
- 95% confidence interval
- Not extracted
- Follow-up
- Not stated
- Adverse events
- Not extracted
- Limitations
- Auto-classified from abstract only; effect estimates, adverse events and limitations not extracted. Requires manual review.
Who was studied
Study quality details
- Study design
- Retrospective cohort
- Sample size
- not extracted
- Randomization
- no
- Blinding
- not stated
- Comparator
- not stated
- Follow up duration
- not stated
- Outcome type
- intermediate
- Replication
- not assessed (auto)
- Consistency with other evidence
- not assessed (auto)
- Population applicability
- UNKNOWN
- Statistical precision
- CI reported: 95% CI, 9
- Risk of bias
- not assessed (auto)
- Funding conflicts
- unclear
- Peer review status
- yes
02Funding
Funding and conflicts
- Funding
- not reported in abstract
- Industry funded
- Unclear
- Manufacturer
- None identified
- Sponsor role
- not reported in abstract
- Author conflicts
- Ms Chabassier is a doctoral candidate supported by a CIFRE grant funded by Withings and the Association Nationale de la Recherche et de la Technologie (ANRT). Dr Vittrant and Mr Binon are full-time employees of Withings. Dr Josse and Dr Scornet declare no competing interests.
- Independent replication
- unknown
Funding is shown on every study and never used to score it.
04Source
The source, as retrieved
Abstract
[OBJECTIVE] To characterize real-world body composition and blood pressure changes following glucagon-like peptide (GLP)-1 receptor agonist (RA) initiation and identify predictors of weight loss quality using connected device data. [PATIENTS AND METHODS] In this retrospective cohort study, adult US users completing an in-application GLP-1 RA survey (June 8, 2023, to July 4, 2024) were followed up using longitudinal device data (December 2021 to September 2025). We used a distributional causal inference framework to match GLP-1 RA users to nonusers. Primary estimands were the distributional average treatment effect on the treated and median differences over months 10 to 14. [RESULTS] Among 2031 users for body composition (396 exposed) and 672 for blood pressure (BP; 148 exposed), GLP-1 RA initiation was associated with a 9.8% median weight reduction (95% CI, 9.8-9.9), driven by fat mass loss (7.5%; 95% CI, 7.5-7.8) with smaller muscle mass loss (2.3%; 95% CI, 2.1-2.4). Sustained reductions were observed in systolic (2.5 mm Hg; 95% CI, 1.5-2.9) and diastolic BP (1.5 mm Hg; 95% CI, 1.2-1.9). Baseline muscle-to-fat ratio (MFR) was the strongest predictor of weight loss quality, with lower MFR individuals losing more fat and sparing more muscle. [CONCLUSION] In a real-world setting, GLP-1 RA initiation was associated with clinically significant fat-predominant weight loss and sustained BP improvements. Baseline MFR predicted weight loss quality, suggesting that pretreatment body composition may help clinicians anticipate individual responses-a step toward precision medicine in GLP-1 RA therapy.
Where this record came from
| Source | Retrieved | Identifier |
|---|---|---|
| pubmed | Sep 20, 2026 | 42746268 first ingestion |